Water heater



March 7, 1933. M. 1. LARSEN 1,900,451

WATER HEATER Filed June 4, 1932 2 Sheets-Sheet l I II :1 /5 Z5 Q 2/ 50f1:

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March 7, 1933.

M. I. LARSEN WATER HEATER Filed June 4, 1932 2 Sheets-Sheet 2;conformity. with the showing of the drawings the wallof the head 6 asillustrated ig- Patented Mar. 7, 1933 v I it i w 7' one re MARTIIQLAESEN, or CHICAGO, ILLIno'rs .warnn HEATER I Application filed June4, 1932; Serial No. 615,447. I

This invention relates to improvements in that any other cross sectionaldesign'may be water heaters and pertains particularly to a employedwithout departing from the spirit" heater which is designed to providehot waof the invention. The tank 1 has a bottom2' ter under pressure orwhich may be employed which rests upon a supporting base'3. 5 for theformation of steam for heating or The bottom 2 is provided withan openinother purposes. I I 4 adjacentone end of the tank body and ex Theprimary object of the present lnventending upwardly through this openinand tion istoprovide a heater for water having a into the tank is acasting which is indi cated novel means for raising the temperature ofgenerally by the numeral 5. This castin the water rapidly after theheater has been comprises a head portion 6 which-is generallyq setgoing. circular in cross section and has the longi- Another object ofthe invention is to protudinally extending central chamber 7 The: vide awater heater wherein the heating unit inner and outer surfaces of thewallof the is disposed within the water container 1 or head 6, arelongitudinally fluted as indicated 715 boiler and the construction issuch that the at '8 and these walls which are relatively heatingunit-may be easily and quicklyrethick as shown in Figures-1 and 3, haveexmoved in'one body from the boiler. tending longitudinally thcrethroughfrom V The invention will be best understood from the top a plurality ofvertical passages cer- .a consideration of the following detailed (16*tain of which are indicated by the numerals scription taken inconnection with the accom 9, while the others are indicated by the nupanying drawings forming part of this speci merals 9'-. Each of thesepassages 9 and19" fication, with the understanding, however,communicates at its lower end witha lateral that the invention isnotconfined to any strict f passage 10 which opens outwardly through butmay be changed or modified so long as tires 1, 3 and 4;

such changes or modifications mark no mate- The central port-ion ofthehead 6 has an- 7 rial departure from the salient features of opening11 which communicates with the the invention as expressed in theappended chamber 7 and the lower'part of the cham .claims. 4 her 7 opensto the full extent of its diameter In the drawings into the small upperend of a substantially 7 Figurelisavertical sectional view throughfrusto-conical hollow base112. The lower the water heaterembodying thepresent inedge of this hollow frusto-conical basepora vention; v tionis'als'o open and surroundingthe edge Figure 2 is a transverse sectionalview takthereof andprojecting laterallyis a1flange13 en on the line 2-2of Figure 1; I which positions against the under side of the 35 Figure 3is an enlarged sectional view tank bottom 2 to which it is secured bysuittaken on the line 3-3 of Figured; able means, such for example, asthe bolts 14; 'c Figure 4c is a sectional view taken substan- Secured inthe upper end of each "of the tially upon the line H of Figure 2;" fverticalpassages-9 is a straight upright w'a- M Figure 5 is a sectionaldetail showing the ter circulating pipe15 while each of-the pasconnection of aywater tube withthe inner sages 9 has secured in itsupper endone casing. v 1 end of a water pipe 16 which curves out-Referring now more particularly to the wardly and downwardly withrespectto the drawings wherein like numerals of reference head 6 and isthen curved further to extend 49 indicate corresponding parts throughoutthe substantially circumferentially of the head several views thenumeral'l indicates as a as indicated 'at- 17 so that itsOther'end willwhole a tank which is of suflicient strength to. terminate in ahorizontal plane passing contain water under pressure or steam. Thisthrough the upper portions of the" lateral tank is preferablysubstantially elliptical in passages 10 and in averticalplane passing 0cross section; although it is to be understood between two of theselateral passages which" the vertical tubes and has their upper endspassing through the top. 21. thereof as indicated at 22 and shown indetail in Figure 5. The central part of the top 21 is provided with anopening surrounded by a collar 23 through which the flue pipe 18 passes.

The lower end of the cylinder is open 1 and has secured therein the ring24 which is connectedwith the curved free ends 17 of the return flowpipes 16.

Disposed within the base portion of the heater is a burner 25 which islocated directly beneath the open lower end of the cone base 12, bymeans of which heater the temperature of the contents of the tank israised. At theend of the tank opposite that in which the heating unit 5is disposed, is a water in- .let 26 with which is connected a returnflowpipe 27 and disposed transversely of the tank and connected with theside walls and the bottom thereof, is a baffle plate 28 which preventsthe water flowing in through the pipe .26 from immediatelycontactingwith the heating unit 5. As shown, this baffle plate 7 28 isinclined toward the adjacent end of the tank away from the heating unitso that the ,infiowing water will rise to a. considerable height in thetank before it comes into contact with theheating unit or the cylindersurrounding the flow tubes.

. The top of the tank isprovided with a suitable outlet pipe asindicated at 29 and the 5; side wall adjacent the top has connectedtherewith a water level indicating glass 3.0 and a pressure indicator 31by means of which latter instrument thev internal pressure of the boilermay be readily determined.

From the foregoing description it will be readily apparent that after.lighting the burner 25 the water in the tubes'9- and 9 will be raised intemperature and that located in the tubes 9' Will'immediately flow outand down to the lateral passages 10. which form the inlets for thepassages 9 which communicate with the vertical tubes 15.

. This passage of heated water outside ofthe.

head6 and at the entrance to the passages 9 will materially facilitatethe establishment of the desired circulation of water upwardly throughthe tubes 15 and, therefore, cause the temperature of the contents ofthe boiler to be rapidly raised. By providing the cylinfifder 20 aroundthe tubes the chilling of the heated water passing upwardly therethroughis prevented by direct contact therewith of water. flowing into thetank.

It-will be apparent from the foregoing that in a tank constructed inaccordance with the present invention the temperature of the watertherein will be rapidly raised with a minimum expenditure of fuel.

Having thus described the invention, what is claimed is L'AIWaterheater, comprising a tank, a chambered heating unit mounted within saidtank upon the bottom and opening through the bottom thereof, flue meansfor removing gases from the said heating unit, water passages formedvertically in the wall of said unit and opening at their lower endslaterally 'intothe tank, water circulating tubes extending verticallyfrom the upper ends of certain of said passages, means for conductingwater from the upper ends of certain others of the passages back to thesaid lateral ports leading into the first mentioned passages. aheatingelement disposed in the lower end of said unit, and water inletandvoutlet means for the tank. a

2; A water heater of the character described, comprising a tank having abottom provided with an opening, a chambered heat-1 ing unit having alower open end and mounted upon said bottom to open downwardly throughthe opening there1n,, water heating passages. formed vertically in thewall of said heating unitand opening through the top thereof andcommunicating at their lower ends with laterally directed inletp0rts,vertically disposed water circulating tubes con-- nected at theirlower ends with the upperends of certain of saidwpassages, means forconducting water from the upper ends of the-oth er of said passagesdownwardly across the outside of the heating unit to the inletportsleading to the passages connected with the vertical tubes, aheating element in the lowor open end of the heating uni-t,a'flue pipeconnected with the upper end of said; unit, and water inlet and outletmeans for thetank;

3. A water heater comprising a tankhavin-ga bottom provided with anopening, a heating unit comprising a substantially frusto-conical hollowcone open at its lower end and having the said lower end secured in thesaid tank bottom opening, a hollow head forming the upper part of theheating unit and in communication with the upper end of thefrusto-conical body, said head having a relatively thick wall providedwith a pluralityof vertical passages each opening at its upper endthrough the top of the head and at its lower end opening laterallythrough the side wall into the tank, water circulating tubes disposedvertically above the head and connected'at their lower ends with certainof said passages, water return tlowtubes connected] with the others ofthe passages and arranged heating unit comprising a substantiallyfrusto-conical hollow cone open at its lower end and havlng the saidlower end secured in the said tank bottom opening, a hollow head formingthe upper part of the heating unit and in communication with the upperend of the frusto-conical body, said head having a relatively thick wallprovided with a plurality of vertical passages each opening at its upperend through the top of the head and at its lower end opening laterallythrough the side wall into the tank, water circulating tubes disposed vrtically above the head and connected at their lower ends with certainof said passages, water return flow tubes connected with the others ofthe passages and arranged to conduct water downwardly for discharge atthe laterally opening lower ends of those passages connected with thevertical tubes, a heating element disposed beneath the open lower end ofthe frusto-conical body, a line connected with the interior of saidhead, water inlet and outlet means for the tank, and a cylinder disposedvertically 'in the tank and surrounding said tubes and havinw its upperend. closed and the tubes passing therethrough and further having itslower end open. g

5. A water heater comprising a tank having a bottom provided with anopening, waterinlet and outlet means "for the tank, a heating unitcomprising a hollow substantially frusto-conical body open at its lowerend and secured about the lower edge in said bottom opening, a hollowhead mounted upon the upper end of the frusto conical' body and openingdownwardly therelnto,

said head havin an opening in its upper end, a flue passage connectedwith the aperture in the upper end of the head and leading to theexterior of the tank, said head having a side wall of substantialthickness and having vertically disposed passages formed in said sidewall from the top downwardly to a point adjacent the bottom of the headand opening laterally through the outer side thereof into the tank, aplurality of vertically disposed tubes connected at their lower ends inthe upper ends of certain of said passages, a plurality of down flowtubes each connected at one end in the upper end of a remaining one ofsaid passages and curved outwardly and downwardly and circumferentiallyacross the outer wall of the head and terminating adjacent the lowerinlet ends of a pair of passages leading to the vertical tubes, acylinders disposed vertically in the tankand surrounding said tubes,said cylinder being closed at its upper end and having the upper ends ofthe vertical tubes opening there through, the lower end of the cylinderbeing open, and a heatingelement disposed beneath the open lower en lotthe frusto-conical body.

6. A water heater comprising a tank hav ing an inlet and an outlet, achambered body within the tank and opening at one side through a wall ofthe tank to receive heat from a. burner element, said chambered bodyhaving a line leading therefrom to the exterior of the tank, a pluralityof passageways formedin the wall ofthe chambered body and having inletand outlet ends, and means for creating a circulation of water betweenthe outlet ends of certain of the-passageways and theinlet ends of theother passageways.

7. A water heat-er comprising a tank hav-' ing an inlet and an outlet,abottom wall, a chamberedbody having an upper portion and a lower; porion, the said upper portion hav- 'ing a=relat1vely thick wall and thelower portion being of substantially frusto-conical formationand'opeuing downwardly through the bottom of the tank, and a heatingelement disposed beneath the open lower portion of the body, watercirculating passageways formed in the thickened wall ofthe upper portionand having lower inlet ends and upper outlet ends, and means forconducting water from the outlet ends of certainof the passages back tothe lower inlet ends of adjacent passages. i a

8.7 A water heater comprising a tank hav-' ing a bottom wall :and aninlet and an outlet, a body disposed within the tankhaving an upperportion and a-lower portion, said portions of thebody being hollowandsaid lower portion being [substantially frus'to-conical and openingat its lower end through said bottom wall, said upper portion having aplurality of vertical" water circulating pas sages in its wall open attheir upper and lower ends, a heating element beneath'the lower portionof the body, an exhaust flueconnected with theupper portion of the body,and a" plurality of' return flow pipes'each connected atone end in theupper endof a water passage and extending downwardly tions of the bodybeing hollow and said lower portion being substantially frusto-conicaland opening at its lower end through said bottom wall, said upperportion having a plurality of vertical water circulating passages in itswall open at their upper and lower ends,,a heating element beneath thelower portion of the body, an exhaust flue connected with the upperportion of the body, a plurality of return flow pipes each con- 5 nectedat one end in the upper end of a water passage and-extending downwardlyand in a circumferential direction with respect to the upper portion ofthe body and terminating adjacent the lower inlet end of an adjai'o"cent water passage, a casing enclosing the upper portion of the body andopen adjacent the lower part thereof and closed above the body, andwater conducting tubes connected with the upper ends of the saidadjacent 15 water passages and extending to and opening through theclosed upper portions of the casing.

10. A water heater comprising a tank having an inlet and an outlet, abottom wall,

7 6 a chambered body having an upper portion and a lower portion, thesaid upper'portion having a relatively thick wall and-the lower portionbeing of substantially frusto-conical formation and opening downwardlythrough 2 5 the bottom of the tank, a heating element disposed beneaththe open lower portion of the body, water circulating passageways 7formed in the thickened wall of the upper portion and having lower inletends and at upper outlet ends, means for conducting water from theoutlet ends of certain of the" passages back to the lower inlet ends ofad-v j acent passages, a casing enclosing the said upper portion of thebody and being open 33 adjacent the lower part of the body and closedabove the body, and water tubes extending from the said adjacent waterpassageways of the body through the closed top of the casing.

4o 11. In a water heater, a hollow body designed to be placed in a tank,means for heating the interior of said body, fluid circulating passagesformed about said body and in communication at their ends with the conastents of the tank, and means for directing the fluidissuing from an endof certain of the passages back to the inlet ends of the other passages.i

In testimony whereof I hereunto aflix my "5 9 signature. 7

MARTIN I. LARSEN.

